Register Configuration; Figure 2.6 Cpu Internal Registers - Renesas H8S/2158 User Manual

2.4

Register Configuration

The H8S/2000 CPU has the internal registers shown in figure 2.6. There are two types of registers:
general registers and control registers. Control registers are a 24-bit program counter (PC), an 8-bit
extended control register (EXR), and an 8-bit condition code register (CCR).
General Registers (Rn) and Extended Registers (En)
15
ER0
ER1
ER2
ER3
ER4
ER5
ER6
ER7 (SP)
Control Registers
Legend:
SP : Stack pointer
PC : Program counter
EXR : Extended control register
T : Trace bit
I2 to I0 : Interrupt mask bits
CCR : Condition-code register
I : Interrupt mask bit
UI : User bit or interrupt mask bit
Note: * Does not affect operation in this LSI.
E0
E1
E2
E3
E4
E5
E6
E7
23
H : Half-carry flag
U : User bit
N : Negative flag
Z : Zero flag
V : Overflow flag
C : Carry flag

Figure 2.6 CPU Internal Registers

0 7 0 7
R0H
R1H
R2H
R3H
R4H
R5H
R6H
R7H
PC
7 6 5 4 3 2 1 0
EXR *
T
7 6 5 4 3 2 1 0
CCR
I UI H U N Z V C
Rev. 3.00 Jan 25, 2006 page 25 of 872
Section 2 CPU
0
R0L
R1L
R2L
R3L
R4L
R5L
R6L
R7L
0
- - - -
I2 I1 I0
REJ09B0286-0300